JP2023501838A - Secondary battery and battery module - Google Patents

Abstract

The present application is a secondary battery (1) comprising a first electrode sheet (10) and a second electrode sheet (20), wherein the first electrode sheet (10) comprises a plurality of first comprising a conductive layer (11) and a first bend (12), two adjacent first conductive layers (11) are connected via the first bend (12); The electrode sheet (20) includes a plurality of second conductive layers (21) and second bent portions (22), and a second conductive layer (21) is provided between two adjacent second conductive layers (21). A plurality of first conductive layers (11) and a plurality of second conductive layers (21) are alternately laminated and connected via bent portions (22) to provide a first conductive layer When viewed along a first direction of the surface perpendicular to (11), the first bend (12) extends along a second direction perpendicular to the first direction. comprising an edge (121), the second bend (22) comprising a second edge (221) extending along a third direction perpendicular to the first direction, the second direction provides a secondary battery that differs from the third direction. Further regarding the battery module (100), by using the above secondary battery (1), the space utilization rate inside the battery can be improved, and the energy density of the battery itself can be improved.

Description

The present application relates to secondary batteries and battery modules.

The structure of the traditional rechargeable secondary battery is generally applied to mobile phones, notebooks, electric vehicles and other products, the size of such products is large, and the space occupation ratio of the internal usable capacity of the battery is high. However, with the development of small portable electronic products, the requirements for battery size are becoming higher and higher. If the internal structure of a conventional secondary battery is applied within the allowable size of the battery, there is room for further improvement in energy density.

In view of this, there is an increasing demand for battery size, and there is a need to provide secondary batteries and battery modules with the aim of being able to improve the energy density of batteries.

The present application is a secondary battery comprising a first electrode sheet and a second electrode sheet, wherein the first electrode sheet includes a plurality of first conductive layers and first bends, and adjacent The second electrode sheet includes a plurality of second conductive layers and second bends, and two adjacent first conductive layers are connected via a first bend. The two second conductive layers are connected via a second bent portion, the plurality of first conductive layers and the plurality of second conductive layers are alternately laminated, and the first When viewed along a first direction of the surface perpendicular to the conductive layer of the first bend, the first edge extends along a second direction perpendicular to the first direction. wherein the second bend includes a second edge extending along a third direction perpendicular to the first direction, the second direction being different than the third direction, the secondary provide the battery.

In one possible embodiment, the first electrode sheet comprises a first metal layer and a first material layer, the first metal layer comprising a first surface and a second surface, the first is provided on the first surface and the second surface, the first conductive layer and the first bend are formed by bending the first metal layer;
The second electrode sheet includes a second metal layer and a second material layer, the second metal layer includes a third surface and a fourth surface, the second material layer includes a third surface. Provided on the surface and the fourth surface, the second conductive layer and the second bend are formed by bending the second metal layer.

In one possible embodiment, the first electroded sheet includes a first end and a first surface extends from the first end with the first surface exposed. 1 region.

In one possible embodiment, the second electroded sheet includes a second end located away from the first end of the second electroded sheet, and the third surface is the third surface and a second region extending from the second end where the is exposed.

In one possible embodiment, the first bend exposes the first surface.

In one possible embodiment, the first bend is provided with a first layer comprising insulating material at the location where the first surface is exposed.

In one possible embodiment, the third surface is exposed from the second bend.

In one possible embodiment, the first direction is the thickness direction of the first material layer and the second material layer, the first material layer having a thickness at the first surface of the second Unlike the thickness at the surface, the second material layer has a thickness at the third surface that differs from the thickness at the fourth surface.

In one possible embodiment, the first electroded sheet or the second electroded sheet is provided with a conductive plate.

In one possible embodiment, the first electroded sheet is provided with a first conductive plate and the second electroded sheet is provided with a second conductive plate such that when viewed along the first direction, the first The range of the angle θ between the first conductive plate and the second conductive plate is 0°≦θ≦180°.

In one possible embodiment, a first electroded sheet is provided with a first opening, a first conductive plate is located in the first opening, a second electroded sheet is provided with a second opening, A second conductive plate is located in the second opening.

In one possible embodiment, the first conductive layer includes a first edge and a first area, and along the third direction the projected length of the first area is a first longer than the projected length of the edge of

In one possible embodiment, the first conductive layer further comprises a second area portion, the projected length of the second area portion being the projected length of the first area portion along the third direction. between the length and the projected length of the first edge.

In one possible embodiment, along the first direction there is a distance in the first bend that is greater than the distance between two adjacent first edges.

In one possible embodiment, the first conductive layer further comprises a second edge opposite the first edge, and along the second direction the first edge and the second conductive layer is different than the distance between the second edge and the second conductive layer.

In one possible embodiment, the distance between the first edge proximate the _first edge and the second conductive layer is K1, and the second edge proximate the second edge and the second ₂ is K2, and the _sum of K1 and K2 is ₃ mm or less.

In one possible embodiment, some first edges are set apart from each other when viewed along the first direction.

In one possible embodiment, the first conductive layer further comprises a first side edge, both ends of the first side edge being respectively connected to the first edge and the second edge, and the first Along the direction, some first side edges are set apart from each other.

In one possible embodiment, some first bends are placed separately from each other when viewed along the first direction.

In one possible embodiment, the second conductive layer includes a third edge and a third area, and along the second direction the projected length of the third area is a third longer than the projected length of the edge of

In one possible embodiment, the second conductive layer further comprises a fourth area portion, the projected length of the fourth area portion being the projected length of the third area portion along the second direction. between the length and the projected length of the third edge.

In one possible embodiment, each end of the second bend is connected to an adjacent third edge of the second conductive layer, and along the first direction, the second bend includes: There is a distance that is greater than the distance between two adjacent third edges.

In one possible embodiment, the second conductive layer further comprises a fourth edge opposite the third edge, and along a third direction the third edge and the first conductive layer is different from the distance between the fourth edge and the first conductive layer.

In one possible embodiment, the distance between the second edge proximate the _third edge and the first conductive layer is K3, and the second edge proximate the fourth edge and the first The distance between the first conductive layer is _K4 , and the sum of _K3 and K4 is ₃ mm or less.

In one possible embodiment, some third edges are placed separately from each other along the first direction.

In one possible embodiment, the second conductive layer further comprises a second side edge, both ends of the second side edge being connected to the third edge and the fourth edge, respectively, and the first When viewed along the direction, some second side edges are set apart from each other.

In one possible embodiment, some second bends overlap along the first direction.

In one possible embodiment, the secondary battery is provided between the first electroded sheet and the second electroded sheet and configured to separate the first electroded sheet and the second electroded sheet. further comprising a separator.

In one possible embodiment, the separator comprises at least one of polyethylene or polypropylene.

In one possible embodiment, the plurality of first conductive layers extend the same distance along the third direction and gradually decrease the distance along the second direction. , the plurality of second conductive layers extend the same distance along the third direction and gradually decrease in distance along the second direction.

In one possible embodiment, the plurality of first conductive layers extend a gradually decreasing distance along the third direction and a gradually decreasing distance along the second direction. and the plurality of second conductive layers gradually decrease in distance along the third direction and gradually decrease in distance along the second direction.

A battery module comprising a first housing and a second housing fitted to the first housing, the battery module further comprising the secondary battery according to any one of the above, are housed within the first housing and the second housing and are electrically connected to the first housing and the second housing, respectively.

In one possible embodiment, the battery module further comprises a connecting member provided between the secondary battery and the first housing or between the secondary battery and the second housing.

In one possible embodiment, the battery module further comprises a first connection member and a second connection member, the first connection member connecting the secondary battery and the first housing, the second connection A member connects the secondary battery and the second housing.

In one possible embodiment, the first housing and the second housing are at least one of aluminum plastic film, polyethylene, polypropylene, polyethylene terephthalate.

In one possible embodiment, the first housing and the second housing comprise at least one of phenolic resin, polyurethane resin, epoxy resin, unsaturated polyester resin, furan resin, organosilicon resin, allyl resin. .

In one possible embodiment, the first housing and the second housing comprise at least one of steel material, aluminum alloy material, magnesium alloy material, copper alloy material, nickel alloy material, or titanium alloy material. .

By using the above-described secondary battery and battery module, the first electrode sheet and the second electrode sheet in the secondary battery are repeatedly bent and laminated along different directions, and a large size is obtained along the lamination direction. can accommodate the first electrode sheet and the second electrode sheet, thereby improving the energy density of the secondary battery.

1 is a schematic perspective view of a secondary battery in a first embodiment of the present application; FIG. FIG. 2 is a schematic cross-sectional view along the AA direction of the secondary battery shown in FIG. 1; It is a top surface schematic diagram of the 1st electrode sheet laminated|stacked. FIG. 4B is a schematic top view of the first side edge having an arc shape in another embodiment of the present application; It is a top surface schematic diagram of the 1st electroconductive layer laminated|stacked by other embodiment. FIG. 4 is a schematic cross-sectional view of part of a secondary battery in another embodiment; FIG. 2 is a schematic cross-sectional view along the BB direction of the secondary battery shown in FIG. 1; It is a top surface schematic diagram of the 2nd electrode sheet laminated|stacked. FIG. 5 is a schematic top view of the second side edge having an arc shape in another embodiment of the present application; It is a top surface schematic diagram of the 2nd conductive layer laminated|stacked by other embodiment. FIG. 4 is a schematic cross-sectional view of part of a secondary battery in another embodiment; Other embodiments are situations in which there is a spacing distance between the first and second conductive layers that are laminated. Another embodiment is the situation where there is a spacing distance between the laminated second conductive layer and the first conductive layer. FIG. 4B is a schematic diagram showing the development of the first electrode sheet in one embodiment of the present application. FIG. 15 is a schematic cross-sectional view along the CC direction of the first electrode sheet in FIG. 14; FIG. 4B is a schematic diagram showing the development of the second electrode sheet in one embodiment of the present application. FIG. 17 is a schematic cross-sectional view along the DD direction of the second electrode sheet in FIG. 16; FIG. 2 is a schematic perspective view of lamination of a first electrode sheet and a second electrode sheet in the first embodiment of the present application; FIG. 2 is a schematic diagram showing the first electrode sheet exposed to the first metal layer in one embodiment of the present application. FIG. 20 is a schematic cross-sectional view along the EE direction of the first electrode sheet in FIG. 19; FIG. 2B is a schematic diagram showing the second electrode sheet in the first embodiment of the present application in which the second metal layer is exposed; FIG. 22 is a schematic cross-sectional view of the second electrode sheet in FIG. 21 along the FF direction; It is a cross-sectional schematic diagram which laminated|stacked the 1st electrode sheet which exposes a 1st metal layer, and the 2nd electrode sheet which exposes a 2nd metal layer. FIG. 16 is a schematic top view of the first electrode sheet unfolded in FIG. 15 in which the active layer is removed at the first bent portion; FIG. 25 is a schematic cross-sectional view along the GG direction of the first electrode sheet shown in FIG. 24; FIG. 25 is a schematic cross-sectional view after lamination of the first electrode sheets shown in FIG. 24 ; FIG. 25 is a schematic cross-sectional view after the first electrode sheets shown in FIG. 24 are laminated in another embodiment; FIG. 26 is a schematic cross-sectional view of the first electrode sheet shown in FIG. 25 in which a first layer is provided at a position of a first bent portion; FIG. 29 is a schematic cross-sectional view after laminating the first electrode sheets shown in FIG. 28 ; FIG. 18 is a schematic top view of the second electrode sheet unfolded in FIG. 17 in which the active layer is removed at the second bent portion; FIG. 31 is a schematic cross-sectional view along the HH direction of the second electrode sheet shown in FIG. 30; 32 is a schematic cross-sectional view after the second electrode sheets shown in FIG. 31 are laminated; FIG. 32 is a schematic cross-sectional view after the second electrode sheet shown in FIG. 31 is laminated in another embodiment; FIG. 1 is a schematic perspective view of a secondary battery provided with a conductive plate according to a first embodiment of the present application; FIG. FIG. 10 is a schematic perspective view of a secondary battery provided with a first conductive plate and a second conductive plate according to another embodiment; FIG. 10 is a schematic perspective view of a secondary battery provided with a first conductive plate and a second conductive plate according to another embodiment; FIG. 10 is a schematic perspective view of a secondary battery provided with a first conductive plate and a second conductive plate according to another embodiment; FIG. 35 is a schematic cross-sectional view of part of the secondary battery shown in FIG. 34 in which a conductive plate is provided on the first electrode sheet; 35 is a schematic cross-sectional view of a portion of the second electrode sheet of the secondary battery shown in FIG. 34 provided with a conductive plate; FIG. FIG. 4 is a schematic cross-sectional view of a portion of the first embodiment of the present application in which a separator of a specific form is not provided between the first electrode sheet and the second electrode sheet; FIG. 4 is a schematic perspective view of a battery module according to another embodiment of the present application; FIG. 42 is an exploded schematic view of the battery module shown in FIG. 41; FIG. 2 is a schematic cross-sectional view along the JJ direction of the battery module; FIG. 10 is an exploded schematic diagram showing a connection member provided inside the battery module shown in another embodiment. FIG. 45 is a schematic cross-sectional view of the battery module shown in FIG. 44; FIG. 11 is an exploded schematic diagram showing a first connection member and a second connection member provided in a battery module shown in another embodiment; FIG. 47 is a schematic cross-sectional view of the battery module shown in FIG. 46; FIG. 10 is a schematic top view of a first electrode sheet in a second embodiment of the present application; FIG. 10 is a schematic top view of a second electrode sheet in a second embodiment of the present application; FIG. 5 is a schematic cross-sectional view after lamination of the first electrode sheet and the second electrode sheet in the second embodiment of the present application; FIG. 10 is a schematic diagram of top surface development when the second electrode sheet is developed in the second embodiment of the present application. FIG. 6 is a schematic cross-sectional view after lamination of the first electrode sheet and the second electrode sheet in the second embodiment of the present application; FIG. 11 is a schematic top view of a first electrode sheet in a third embodiment of the present application; FIG. 11 is a schematic top view of a second electrode sheet in a third embodiment of the present application; FIG. 10 is a schematic cross-sectional view after laminating the first electrode sheet and the second electrode sheet in the third embodiment of the present application; FIG. 11 is a schematic top view of a first electrode sheet in a fourth embodiment of the present application; FIG. 11 is a schematic top view of a second electrode sheet in a fourth embodiment of the present application; FIG. 12 is a schematic cross-sectional view after laminating the first electrode sheet and the second electrode sheet in the fourth embodiment of the present application; It is a perspective schematic diagram of the electronic device in 5th Embodiment of this application.

The following clearly and specifically describes the technical solutions in the embodiments of the present application, obviously, the described embodiments are some embodiments of the present application, not all the embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the specification of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

Hereinafter, embodiments of the present application will be described in detail. This application may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to fully and fully convey the present application to those skilled in the art.

Also, the size or thickness of various units, layers may be exaggerated in the drawings for conciseness and clarity. As used herein, the terms "and/or" and "and/or" include any and all combinations of one or more of the associated listed items. Further, when element A is said to be “connected” to element B, element A may be directly connected to element B, or there may be an intermediate element C such that element A and element B are indirectly connected to each other. It should be understood that it may be connected to

Further, when describing embodiments of the present application, use of "may" means "one or more embodiments of the present application."

The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting of the application. As used herein, singular forms are intended to include plural forms unless the context clearly dictates otherwise. It should also be understood that the term "comprising," as used herein, means that the stated features, values, steps, operations, elements and/or components are present, but one or more does not exclude the presence or increase of other features, values, steps, operations, elements, components and/or combinations thereof.

Spatial terms such as "above" may be used herein for ease of explanation, and may be used to describe one element or feature shown in a figure and another element (elements) or feature shown. (characteristics). It is to be understood that, other than the orientation depicted in the figures, space-related terms are intended to include different orientations during use or operation of the device or apparatus. For example, if the device in the figures is flipped, elements located "above" or "above" other elements or features are oriented "below" or "below" other elements or features. Thus, the exemplary term "above" can include directions above and below. It should be understood that terms such as "first," "second," "third," etc. may be used herein to describe various elements, components, regions, layers and/or sections. However, these elements, components, regions, layers and/or sections should not be limited to these terms. These terms are used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without contradicting the teachings of the embodiments.

The present application is a secondary battery comprising a first electrode sheet and a second electrode sheet, the first electrode sheet including a plurality of first conductive layers and a first bend, Two adjacent first conductive layers are connected via a first bent portion, the second electrode sheet includes a plurality of second conductive layers and a second bent portion, and the adjacent The two second conductive layers are connected via a second bent portion, and the plurality of first conductive layers and the plurality of second conductive layers are alternately laminated, When viewed along the first direction of the first conductive layer, the first bend includes a first edge extending along a second direction perpendicular to the first direction; The second bend includes a second edge extending along a third direction perpendicular to the first direction, the second direction being different than the third direction, the secondary battery offer.

In the above secondary battery, the first electrode sheet and the second electrode sheet are alternately bent along different directions, so that the first electrode sheet and the second electrode sheet are laminated in the first direction. By using the secondary battery, more electrode sheets can be accommodated in a limited space, thereby improving the energy density of the secondary battery.

Several embodiments of the present application are described in detail below. Where not conflicting, the following examples and features in the examples can be combined with each other.

First Embodiment Referring to FIG. 1, a secondary battery 1 includes a first electrode sheet 10 and a second electrode sheet 20, the first electrode sheet 10 comprising a plurality of first conductive electrodes. two adjacent first conductive layers 11 are connected via the first bend 12, and the first conductive layer 11 and the first A first boundary M exists between the first conductive layer 11 and the first bent portion 12 , and the first boundary M is a position where the first conductive layer 11 and the first bent portion 12 are connected. The second electrode sheet 20 includes a plurality of second conductive layers 21 and second bent portions 22 , and two adjacent second conductive layers 21 are separated from each other via the second bent portions 22 . and a second boundary N exists between the second conductive layer 21 and the second bend 22, the second boundary N being between the second conductive layer 21 and the second bend This is the position where the part 22 is connected.

A plurality of first conductive layers 11 and a plurality of second conductive layers 21 are alternately laminated, and the direction perpendicular to the first conductive layers 11 and the second conductive layers 21 is the first conductive layer 11 and the second conductive layers 21 . One direction Z and viewed along the first direction Z, the first bend 12 includes a first edge 121 extending along the second direction Y and a second The bend 22 includes a second edge 221 extending along the third direction X. As shown in FIG. An angle is provided between the second direction Y and the third direction X, ie the second direction Y is different from the third direction X. FIG.

The secondary battery 1 will be further described below.

Referring to FIG. 2, a plurality of first conductive layers 11 included in the first electrode sheet 10 are laminated along the first direction Z, and the first bent portion 12 is the first conductive layer 11 and are configured to connect two adjacent first conductive layers 11, each of the first bends 12 at the first boundary M position to the first conductive layer 11.

In one embodiment, the first conductive layer 11 and the first bent portion 12 may be integrally formed so that the first electrode sheet 10 can be easily bent and laminated.

Referring to FIG. 3, observing the first conductive layer 11 along the first direction Z, the first conductive layer 11 includes a first edge 111 and a first region portion 112, The first edge 111 is the edge portion of the first conductive layer 11, and the first edge 111 and the first boundary M have the same structure, and the first edge 111 is the first conductive layer 11. The first boundary M is used to better distinguish between the first conductive layer 11 and the first bent portion 12 . A first region portion 112 is positioned substantially in the middle of the first conductive layer 11, specifically, the first region portion 112 is the region between the two dashed lines in FIG.

Along the third direction X, the projected length in the second direction Y of the first region portion 112 is D1, and the projected length in the second direction Y of the _first edge 111 is D ₂ and the length of D1 is greater _than the length of _D2 . That is, the area of the intermediate position of the first conductive layer 11 is increased more than the area of the edge position, thereby increasing the overall area of the first conductive layer 11 and increasing the energy of the first conductive layer 11. Improve density.

Referring to FIG. 3, in one embodiment, the first conductive layer 11 further includes a second region portion 113, wherein the second region portion 113 comprises the first edge 111 and the first region portion. 112 and is connected to the first edge 111 and the first region portion 112, and the second region portion 113 is located between the first edge 111 and the first region portion 112 in FIG. This is the area between the dashed line near the first edge 111 of the two dashed lines defined as the boundaries of . along the second direction Y, the projected length in the _second direction Y of the _second region portion 113 is D3 _, and the length of _D3 is between D1 and D2, i.e. , the projected length of the second region portion 113 is longer than the projected length of the first edge 111 and shorter than the projected length of the first region A. Thereby, when the first edge 111 of the first conductive layer 11 extends to the first region portion 112, the area of the first edge 111 is gradually increased, and the first conductive layer 11 to further improve the overall energy density.

In one embodiment, the first conductive layer 11 further includes a second edge 114, the second edge 114 being an edge portion of the first conductive layer 11, the first edge 111 and the It is provided oppositely on both sides of the first conductive layer 11 . Moreover, the second edge 114 and the first boundary M are of the same structure, the second edge 114 is used to better describe the composition of the first conductive layer 11, and the first boundary M is used to better distinguish between the first conductive layer 11 and the first bend 12 .

In one embodiment, the first conductive layer 11 further includes a second region 116 located between the second edge 114 and the first region 112 . is connected to the second edge 114 and the first region 112, and the second region 116 is the boundary between the second edge 114 and the first region 112 in FIG. It is the area between the dashed lines of the book and the dashed lines near the second edge 114 . The structure of the second region portion 116 is substantially the same as the structure of the second region portion 113, and in another embodiment, the second region portion 116 has a different structure from the second region portion 113. It can also be understood that

The first conductive layer 11 further includes a first side edge 115 and a first side edge 115', and in this embodiment the first side edge 115 and the first side edge 115' are substantially Provided symmetrically, both ends of the first side edge 115 and the first side edge 115' are connected to the first edge 111 and the second edge 114, respectively, and the first side edges 115 and 115' 1 region 112 and edge portions of the second regions 113 and 116 . It should be noted that "substantially symmetrical" should be understood to include symmetry and also to have a certain dimensional offset between the two, e.g. There is a ±5° offset between the edge 115 and the first side edge 115'. In other embodiments, the first side edge 115 and the first side edge 115' may have an asymmetrical structure such that the shape of the first conductive layer 11 is different, with a predetermined distance between the two. It can be appreciated that angles may be formed.

Additionally, the first side edges 115 and 115' are generally straight.

Referring to FIG. 4, in one embodiment, the first side edges 115 and 115' may also exhibit an arcuate shape, the first side edges 115 and 115' extending in the third direction X , gradually extending from the end of the first edge 111 to the end of the first region 112 , and gradually extending from the first region 112 to the end of the second edge 114 . are doing.

Referring to FIG. 3, in one embodiment, when stacking the first conductive layers 11 along the first direction Z, the first edges 111 of each of the first conductive layers 11 overlap, Furthermore, at least a portion of the plurality of first conductive layers 11 overlap, where "overlapping" includes situations where there is a slight offset between the first edges 111 . Thereby, when the secondary battery 1 is used, the space utilization rate can be improved.

Referring to FIG. 5, FIG. 5 can be viewed as the two first conductive layers 11 not completely overlapping. When stacking the first conductive layer 11 along the first direction Z, some first edges 111 overlap, thereby overlapping some first side edges 115 and 115'.

First edge 111, first region 112, second region 113, second edge 114 and first side edges 115, 115' are integrally molded structures. It can be appreciated that in other embodiments, the first side edges 115 and 115' are not limited to the generally straight and arc shapes described above.

2 and 3 again, when viewed along the first direction Z, the first edge 121 of the first bend 12 is parallel to the first edge 111 . Here, "parallel" should be understood to include the case where there is no included angle between both and the case where a minute included angle exists between both. There is a ±5° deviation between the edge 121 and the first edge 111 . The first bent portion 12 is bent in the third direction X and positioned outside the two first conductive layers 11 in the third direction X. As shown in FIG.

5 and 6, along the third direction X, a first spacing distance L1 occurs between _one first edge 121 and another first edge 121, so that Some first edges 111, first side edges 115 and 115′ are not overlapped, the _first gap distance L1 is 3 mm or less, for example, the volume of the secondary battery 1 is A growing situation can be contained. Furthermore, for example, when the _first spacing distance L1 exists, the connection position between the first bent portion 12 and the first conductive layer 11 connected thereto is different from the adjacent first bent portion 12. , and the connection position of the first conductive layer 11 connected thereto, thereby contributing to reducing the overall height of the secondary battery 1 and improving the energy density of the secondary battery 1 .

Referring to FIG. 6 , when viewed along the first direction Z, there is a distance in the first bend 12 that is greater than the distance between two adjacent first edges 111 . Specifically, there is a _first distance H1 in the first bend 12, where the _first distance H1 is the distance between the ends of the inner bend portion of the first bend 12. , ie the distance between the _first point O1 and the _second point O2. The distance between _two adjacent first edges 111 is the _second distance H2, i.e. the distance between the _third point I1 and the fourth point _I2 Distance. The _first distance H1 is longer than the _second distance H2. By providing in this way, the first bent portion 12 can be easily bent, the colloid can be filled inside the first bent portion 12, and the first bent portion 12 is supported, The strength of the first bent portion 12 can be improved.

In one embodiment, in order to improve the space utilization of the edge of the secondary battery ₁ , the first distance H1 may be the maximum distance in the first direction Z of the first bend 12. Good things can be understood. The _first distance H1 is the same as the _second distance H2, thereby avoiding a long edge distance of the secondary battery 1 when viewed along the first direction Z.

Referring to FIG. 6, in one embodiment, when viewed along the first direction Z, some first bends 12 overlap. If the _first distance H1 is longer than the _second distance H2, then the non-overlapping first bends 12 and the overlapping first bends 12 compensate along the first direction Z. and improve the space utilization of the secondary battery 1 along the first direction Z.

Referring to FIG. 7, the second electrode sheet 20 includes a plurality of second conductive layers 21 laminated along the first direction Z, and the second bends 22 are the second conductive layers. Located on either side of the layer 21 and configured to connect two adjacent second conductive layers 21, each of the second bends 22 is located on the second conductive layer 21 at the second boundary N location. to connect.

In one embodiment, the second conductive layer 21 and the second bent portion 22 may be integrally formed so that the second electrode sheet 20 can be easily bent and laminated.

8, observing the second conductive layer 21 along the first direction Z, the second conductive layer 21 includes a third edge 211 and a third region 212, The third edge 211 is the edge portion of the second conductive layer 21, and the third edge 211 and the second boundary N have the same structure, and the third edge 211 is the second conductive layer. The second boundary N is used to better distinguish between the second conductive layer 21 and the second bend 22 . A third region 212 is located substantially in the middle of the second conductive layer 21, specifically, the third region 212 is the region between the two dashed lines in FIG.

Along the third direction X, the projected length in the third direction X of the third region portion 212 is D4, and the projected length in the third direction X of the _third edge 211 is D4. ₅ and the length of _D4 is longer than the length of _D5 . That is, the area of the middle position of the second conductive layer 21 is increased more than the area of the edge position, thereby increasing the overall area of the second conductive layer 21 and increasing the energy density of the second conductive layer 21. improve.

Referring to FIG. 8, in one embodiment, the second conductive layer 21 further includes a fourth region 213, which comprises the third edge 211 and the third region 211. 212 and is connected to the third edge 211 and the third region portion 212, and the fourth region portion 213 is located between the third edge 211 and the third region portion 212 in FIG. This is the area between the dashed line near the third edge 211 of the two dashed lines defined as the boundaries of . along the third direction X, the projected length of the _fourth region portion 213 in the third direction X is _D6 , and the length of _D6 is between _D4 and D5, i.e. , the projected length of the fourth region portion 213 is longer than the projected length of the third edge 211 and shorter than the projected length of the third region portion 212 .

In one embodiment, the second conductive layer 21 further includes a fourth edge 214, the fourth edge 214 being an edge portion of the second conductive layer 21 and the third edge 211 and It is provided opposite to both sides of the second conductive layer 21 . Furthermore, the fourth edge 214 and the second boundary N are of the same structure, the fourth edge 214 is used to better describe the composition of the second conductive layer 21, and the second boundary N is used to better distinguish the second conductive layer 21 and the second bend 22 .

In one embodiment, second conductive layer 21 further includes a fourth region 216 located between fourth edge 214 and third region 212 . is connected to the fourth edge 214 and the third region 212, and the fourth region 216 is the boundary between the fourth edge 214 and the third region 212 in FIG. It is the area between the dashed lines of the book and the dashed lines near the fourth edge 214 . The fourth region portion 216 has substantially the same structure as the fourth region portion 213, and in other embodiments, the fourth region portion 216 may have a different structure than the fourth region portion 213. It can be understood.

The second conductive layer 21 further includes second side edges 215 and 215', and in this embodiment the second side edges 215 and 215' are provided substantially symmetrically. , both ends of the second side edge 215 and the second side edge 215 ′ are connected to the third edge 211 and the fourth edge 214 respectively, and the second side edges 215 and 215 ′ are connected to the third region portion 212 . and edge portions of the fourth region portions 213 and 216 . In other embodiments, the second side edge 215 and the second side edge 215' may have an asymmetrical structure such that the shape of the second conductive layer 21 is different, with a predetermined distance between them. It can be appreciated that angles may be formed.

Additionally, the second side edges 215 and 215' are generally straight.

Referring to FIG. 9, in one embodiment, the second side edges 215 and 215' may exhibit an arcuate shape, and along the second direction Y, the second side edges 215 and 215' , gradually extends from the end of the third edge 211 to the end of the third region 212 , and the third region 212 gradually extends to the end of the fourth edge 214 . there is

Referring to FIG. 8, in one embodiment, when stacking the second conductive layers 21 along the first direction Z, the third edges 211 of each of the second conductive layers 21 overlap, Additionally, the plurality of second conductive layers 21 overlap, where "overlapping" includes situations where there is a slight offset between the third edges 211 .

Referring to FIG. 10, FIG. 10 can be viewed as two second conductive layers 21 not fully overlapping. When stacking the second conductive layer 21 along the first direction Z, some third edges 211 overlap, thereby overlapping some second side edges 215 and 215'.

The third edge 211, the third region 212, the fourth region 213, the fourth edge 214 and the second side edges 215, 215' are also integrally molded structures. It can be appreciated that in other embodiments, the second side edges 215 and 215' are not limited to the generally straight and arc shapes described above.

Referring again to FIGS. 7 and 8, when viewed along the first direction Z, the second edge 221 of the second bend 22 is parallel to the third edge 211 . The second bent portion 22 is bent in the second direction Y and positioned outside the two second conductive layers 21 .

10 and 11, along the second direction Y, there is a _second spacing distance L2 between one second edge 221 and another second edge 221, so that Some third edges 211 and some second side edges 215 and 215′ do not overlap, and the _second gap distance L2 is 3 mm or less, for example, the secondary battery 1 It is possible to suppress the situation where the volume of is increased. Furthermore, for example, if there is a _second spacing distance L2, the connection position of the second bend 22 and the second conductive layer 21 connected thereto is different from the adjacent second bend 22 and The connection position of the second conductive layer 21 connected thereto is offset from each other, thereby contributing to reducing the overall height of the secondary battery 1 and improving the energy density of the secondary battery 1 .

Referring to FIG. 11 , when viewed along the first direction Z, there is a distance in the second bend 22 that is greater than the distance between two adjacent third edges 211 . Specifically, there is a _third distance H3 in the second bend 22, where the _third distance H3 is the distance between the ends of the inner bend portion of the second bend 22. , ie the distance between the _fifth point O3 and the _sixth point O4. The distance between two adjacent third edges 211 is the _fourth distance _H4 , i.e. the distance between the seventh distance _I3 and the eighth distance _I4 . Distance. A _third distance H3 is longer than a _fourth distance H4. By providing in this way, the first bent portion 12 can be easily bent, the colloid can be filled inside the first bent portion 12, and the first bent portion 12 is supported, The strength of the first bent portion 12 can be improved.

In one embodiment, in order to improve the space utilization of the edge of the secondary battery 1, the _third distance H3 may be the maximum distance in the first direction Z of the second bend 22. Good things can be understood. The _third distance H3 is the same as the _fourth distance H4, thereby avoiding a long edge distance of the secondary battery 1 when viewed along the first direction Z. In another embodiment, the _third distance H3 may be different than the _fourth distance H4.

Referring to FIG. 11, in one embodiment, some of the second bends 22 overlap when viewed along the first direction Z. FIG. If the _third distance H3 is longer than the _fourth distance H4, then the non-overlapping second bend 22 and the overlapping second bend 22 compensate along the first direction Z. and improve the space utilization of the secondary battery 1 along the first direction Z.

Referring to FIG. 12 , FIG. 12 shows a state in which there is a spacing distance between the first conductive layer 11 and the second conductive layer 21 and the first edge adjacent to the first edge 111 . The distance between 121 and the second conductive layer 21 is K1, and the distance between the _first edge 121a adjacent to the second edge 114 and the _second conductive layer 21 is K2. _Yes , _K1 is different from K2. K1 is the distance in the third direction X between the _first edge 121 and the second side edge 215 of the second conductive layer 21, and K2 is the _second edge in the third direction X is the distance between the second side edge 215' of the conductive layer 21 and the first edge 121a. If other structures are provided on the _first conductive layer 11, if K1 is longer _than K2, the other structures are provided on one side of the second edge 114 of the first conductive layer 11. Alternatively, if the second conductive layer 21 is provided on the first conductive layer 11 in the lamination process, the other structure can be fixed.

For example, the _sum of K1 and K2 is ₃ mm or less. By setting the _sum of K1 and K2 to ₃ mm or less, the first edge 111 or the second edge 114 of two adjacent first conductive layers 11 contact each other, thereby preventing a short circuit. Furthermore, an increase in the volume of the secondary battery 1 can be suppressed. In one embodiment, the sum of K ₁ and K ₂ is 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm. It can be appreciated that in other embodiments, the _sum of _K1 and K2 is not limited to these.

Referring to FIG. 13 , FIG. 13 shows a state where there is a spacing distance between the second conductive layer 21 and the first conductive layer 11 and the second edge adjacent to the third edge 211 . The distance between 221 and the first conductive layer 11 is K3 _, and the distance between the second edge 221a adjacent to the _fourth edge 214 and the first conductive layer 11 is K4. Yes _{, K3} is different from K4.
_K3 is the distance in the _second direction Y between the second edge 221 and the first side edge 115 of the first conductive layer 11; is the distance between the first side edge 115' and the second edge 221a of the conductive layer 11 of . Furthermore, the sum of _K3 and K4 is ₃ mm or less. By setting the sum of K3 and K4 to ₃ mm or less, the third edge 211 or the _fourth edge 214 of two adjacent second conductive layers 21 contact each other, thereby preventing a short circuit. Furthermore, an increase in the volume of the secondary battery 1 can be suppressed. _In one embodiment, the sum of K3 and K4 is 0.5 mm, ₁ mm, 1.5 mm, 2 mm, 2.5 mm. It can be appreciated that in other embodiments, the sum of _K3 and _K4 is not limited to these.

14 and 15, the specific structure of the first electrode sheet 10 includes a first metal layer 13 and a first material layer 14. As shown in FIG. 14 and 15 are diagrams schematically showing the configuration of the first electrode sheet 10 in an unfolded state. The first metal layer 13 includes a first surface 131 and a second surface 132, the first material layer 14 is provided on the first surface 131 and the second surface 132, and the first conductive layer 11 and a first bent portion 12 are formed by bending the first metal layer 13 . The first conductive layer 11 and the first bends 12 are the final forming structures included in the first electrode sheet 10 when the first electrode sheet 10 is formed, and the first metal A layer 13 and a first material layer 14 are structures fabricated into the first electrode sheet 10 .

16 and 17, the specific structure of the second electrode sheet 20 includes a second metal layer 23 and a second material layer 24. As shown in FIG. 16 and 17 are diagrams schematically showing the configuration in which the second electrode sheet 20 is not folded. A second metal layer 23 includes a third surface 231 and a fourth surface 232, a second material layer 24 is provided on the third surface 231 and the fourth surface 232, and a second conductive layer 21 and a second bend 22 are formed of a second metal layer 23 . As with the first electroded sheet 10, the second conductive layer 21 and the second bends 22 are ultimately included in the second electroded sheet 20 when the second electroded sheet 20 is formed. It is a molded structure in which the second metal layer 23 and the second material layer 24 are fabricated on the second electrode sheet 20 .

15, 17 and 18, in this embodiment, the first metal layer 13 provided with the first material layer 14 and the second metal layer 23 provided with the second material layer 24 along the first direction Z, the first metal layer 13 is repeatedly bent along the third direction X, the second metal layer 23 along the second direction Y By repeatedly bending, the first metal layer 13 and the second metal layer 23 are alternately laminated to finally form the secondary battery 1 .

Preferably, in this embodiment, the first direction Z, the second direction Y and the third direction X are two directions perpendicular to each other. In other embodiments, other angles between the second direction Y and the third direction X may be 80°, 81°, 82°, 83°, 84°, 85° , 86°, 87°, 88°, 89°, 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, 100° can be

Referring to FIGS. 19 and 20 , the first electrode sheet 10 specifically includes a first metal layer 13 and a first material layer 14 . 19 and 20 are diagrams schematically showing the structure in which the first electrode sheet 10 is not folded. In this embodiment, the first electrode sheet 10 is used to directly electrically connect the secondary battery 1 with the housing structure encased therein. Including one edge 15 , the first surface 131 includes a first area A extending from the first edge 15 . In the first region A, at least a portion of the first surface 131 of the first metal layer 13 is exposed. 21 and 22, the second electrode sheet 20 has a configuration including a second metal layer 23 and a second material layer 24. As shown in FIG. 21 and 22 are diagrams schematically showing the configuration of the state in which the second electrode sheet 20 is not folded. In the present embodiment, the second electrode sheet 20 includes a second end 25, and the second end 25 is positioned away from the first end 15 of the second electrode sheet 20, Third surface 231 includes a second region B extending from second end 25 where at least a partial surface of second metal layer 23 is exposed. The exposure is exposed to other locations of the first region A or the second region B, and the metal layer at other locations is covered with the material layer, so that the first region The metal layer at the location of A and the second region B is exposed compared to the coated metal layer.

Referring to FIG. 23 , after the secondary battery 1 is folded and formed, a first area A and a second area B are located at opposite ends of the secondary battery 1 in the first direction Z, respectively.

24 and 25 schematically show the unfolded configuration of the first electrode sheet 10, wherein the first metal layer 13 has a first surface 131 and a second surface 132. , and the plurality of first material layers 14 are provided on the first surface 131 and the second surface 132 . A plurality of first surfaces 131 and a plurality of second surfaces 132 are exposed between the first material layers 14 . In the present embodiment, the surface exposed between the first material layers 14 is defined as the first exposed portion 17, and "exposed" here means that part of the first metal layer 13 is the first exposed portion 17. It means that the first exposed portion 17 is exposed from the first material layer 14, and the fact that the first exposed portion 17 is covered with the electrolytic solution and the housing cannot be denied. Referring to FIG. 26 , the first exposed portion 17 is positioned for each first bent portion 12 . For example, the first material layer 14 on the surface of the first metal layer 13 can be removed at the location of the first bend 12 and removed by intermittent coating, laser cleaning, blade removal, or the like. By removing the first material layer 14 at the position of the first bending portion 12, for example, when the secondary battery 1 is applied to a high-current charging scene, the lithium deposition phenomenon can be suppressed, and the bending It is possible to prevent the first material layer 14 from being easily dropped from the first metal layer 13, and to suppress other influences caused to the secondary battery 1 due to this phenomenon. can be done.

Referring to FIG. 25, the opening distance of the first exposed portion 17 is different, and the distance of the first metal layer 13 exposed from the first bent portion 12 is 0.2 mm to 5 mm. The opening distance of the exposed portion 17 of 1 is 0.2 mm to 5 mm. Specifically, the distance of the first exposed portion 17 may be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.52 mm, 3.2 mm, 3.52 mm, 4.2 mm, 4.5 mm. good. For example, by opening the first exposed portion 17, the overall height of the secondary battery 1 along the first direction Z can be reduced, thereby improving the energy density.

28 and 29, in one embodiment, the first bend 12 is provided with a first layer 16 comprising insulating material at the first exposed portion 17 location. A first layer 16 is coated on the first surface 131 of the first metal layer 13 at the first exposed portion 17 . For example, if the secondary battery 1 is illegally used by a machine, a breakage failure occurs at the position of the first bent portion 12, so that the first electrode sheet 10 and the second electrode sheet 20 are in contact with each other. To suppress the case of short circuit.

30 and 31 schematically show the configuration of the second electrode sheet 20 in an unfolded state, wherein the second metal layer 23 has a third surface 231 and a fourth surface 232. , and the plurality of second material layers 24 are provided on the third surface 231 and the fourth surface 232 . A plurality of third surfaces 231 and a plurality of fourth surfaces 232 are exposed between the second material layers 24 . In this embodiment, the surface exposed between the second material layers 24 is defined as the second exposed portion 27, and the term “exposed” here means that part of the second metal layer 23 is exposed to the second exposed portion 27. 2, and the fact that the second exposed portion 27 is covered with the electrolytic solution and the housing cannot be denied. Referring to FIG. 32, in one embodiment, a second exposed portion is provided at the second bend 22 to prevent a situation where the second material layer 24 at the location of the second bend 22 falls off. 27 is provided, and the third surface 231 and the fourth surface 232 of the second metal layer 23 are exposed from the position of the second exposed portion 27, and the second metal layer 23 is subjected to intermittent coating, laser cleaning, blade removal, or the like. Material layer 24 may be removed.

Referring to FIG. 33, the opening distance of the second exposed portion 27 is different, and the distance of the second metal layer 23 exposed from the second bent portion 22 is 0.1 mm to 5 mm. 2, the opening distance of the exposed portion 27 is 0.1 mm to 5 mm. Specifically, the distance of the second exposed portion 27 may be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.52 mm, 3.2 mm, 3.52 mm, 4.2 mm, 4.5 mm. good. For example, by opening the second exposed portion 27, the overall height of the secondary battery 1 along the first direction Z can be reduced, thereby improving the energy density.

Referring again to FIGS. 15 and 17 , in one embodiment, the first direction Z is the thickness direction of the first material layer 14 and the second material layer 24 . The first material layer 14 has a thickness at the first surface 131 that differs from the thickness at the second surface 132 and the second material layer 24 has a thickness at the third surface 231 that is a fourth. The thickness at surface 232 is different.

Specifically, first material layer 14 has a thickness at first surface 131 that is greater than a thickness at second surface 132 . The second material layer 24 has a greater thickness at the third surface 231 than at the fourth surface 232 . By making the thicknesses of the first material layer 14 and the second material layer 24 different, the space utilization rate of the secondary battery 1 as a whole can be further improved.

It can be appreciated that in other embodiments, the thickness of the first material layer 14 at the second surface 132 may be greater than the thickness of the first material layer 14 at the first surface 131 . . The thickness of the second material layer 24 on the fourth surface 232 is greater than the thickness of the material layer on the third surface 231 . The thickness of the first material layer 14 is the same on the first surface 131 and the second surface 132, and the thickness of the second material layer 24 is the same on the third surface 231 and the fourth surface 232. can be

In this embodiment, the first electrode sheet 10 is a positive electrode sheet and the second electrode sheet 20 is a negative electrode sheet. The first metal layer 13 and the second metal layer 23 are current collector layers, and the first material layer 14 and the second material layer 24 are active material layers. In the field of batteries, collector layers and active material layers of positive electrode sheets and negative electrode sheets are common. For example, aluminum foil is used as the current collector layer of the positive electrode sheet, copper foil is used as the current collector layer of the negative electrode sheet, and the current collector layer is coated with the active material layer to form the electrode sheet.

Referring to FIG. 34, a conductive plate 30 is provided on the first electrode sheet 10 or the second electrode sheet 20 . The first electroded sheet 10 or the second electroded sheet 20 may be electrically connected via conductive plates 30 to the housing structure encased therein. Further, conductive plate 30 is a tab.

35, 36 and 37, in one embodiment, the first electrode sheet 10 is provided with a first conductive plate 31 and the second electrode sheet 20 is provided with a second conductive plate 32. be done. When observed along the first direction Z, the range of the angle θ between the first conductive plate 31 and the second conductive plate 32 is 0°≦θ≦180°.

Specifically, referring to FIG. 35, when viewed along the first direction Z, the first conductive plate 31 and the second conductive plate 32 overlap.

Referring to FIG. 36, when viewed along the first direction Z, the angle θ between the first conductive plate 31 and the second conductive plate 32 is 90°.

Referring to FIG. 35, when viewed along the first direction Z, the angle θ between the first conductive plate 31 and the second conductive plate 32 is 180°.

It can be appreciated that in other embodiments, the angle θ may be other angles and may be provided according to specific circumstances. A first conductive plate 31 may be provided on each of the first electrode sheets 10, a second conductive plate 32 may be provided on each of the second electrode sheets 20, and a plurality of first conductive plates may be provided. A plate 31 is connected and a plurality of second conductive plates 32 are connected and connected to the housing.

38, if the first electrode sheet 10 is provided with the first conductive plate 31 or the second electrode sheet 20 is provided with the second conductive plate 32, the first metal layer 13 A first opening 18 is formed by removing a portion of the first material layer 14 from either the first surface 131 or the second surface 132 of the first metal layer 13 electrically connected to the first metal layer 13 . A conductive plate 31 is provided at the position of the first opening 18 . Referring to FIG. 37, a portion of second material layer 24 is removed from third surface 231 or fourth surface 232 of second metal layer 23 to form second opening 28, and a second opening 28 is formed. A second conductive plate 32 electrically connected to the metal layer 23 is provided at the position of the second opening 28 .

In this embodiment, the first opening 18 and the second opening 28 are surrounded by the surface of the first metal layer 13 and the side surfaces of the first material layer 14, or the second metal layer 23 and the side surfaces of the second material layer 24 .

A first electrode sheet 10 and a second electrode sheet 20 are electrically connected to the housing structure via a first conductive plate 31 and a second conductive plate 32, respectively.

Referring to FIG. 2 again, in one embodiment, the secondary battery 1 further includes a separator 40, the separator 40 is provided between the first electrode sheet 10 and the second electrode sheet 20, It is configured to separate one electrode sheet 10 and a second electrode sheet 20 .

Separator 40 may include at least one or more of polyethylene, polypropylene, but is not limited thereto.

Referring to FIG. 40, in one embodiment, separator 40 may be in liquid form. That is, the electrolyte membrane can be used instead of the separator 40 to separate the first electrode sheet 10 and the second electrode sheet 20, and the electrolyte membrane can ensure the transmission of lithium ions during charging and discharging processes. Methods of using electrolyte membranes as liquid separators 40 exist in the prior art. We will not discuss this in detail here.

41, the present application further provides a battery module 100, the battery module 100 includes a first housing 50 and a second housing 60 fitted to the first housing 50, and the above Further includes secondary battery 1 in any of the embodiments. The secondary battery 1 is housed in the first housing 50 and the second housing 60 and connected to the first housing 50 and the second housing 60 . Since the battery module 100 uses the secondary battery 1 in any of the above embodiments, it has all the beneficial effects of the secondary battery 1 described above. We will not discuss this in detail here.

42 and 43, the first housing 50 includes a first cover 51, a pole post 52 and a first insulating member 53. As shown in FIG. The pole post 52 and the first insulating member 53 are provided on the side of the first cover 51 facing the second housing 60 , and the pole post 52 is configured to be connected to the secondary battery 1 . When the first housing 50 is installed on the second housing 60 , the first insulating member 53 is positioned between the first cover 51 and the second housing 60 . The first insulating member 53 is configured to insulate the first cover 51 and the second housing 60 and may be configured to seal the first housing 50 and the second housing 60 .

A through hole 54a is formed in the first insulating member 53, and the pole column 52 passes through the through hole 54a.

A second housing 60 includes a second cover 61 , a case 62 and a second insulating member 63 . A second cover 61 is provided at an end position of the case 62, and the secondary battery 1 is accommodated in the case 62, and is wrapped with an insulating layer (not shown) on the outside so that the secondary battery 1 and the case 62 are insulated. The second insulating member 63 is provided between the secondary battery 1 and the second cover 61 and configured to separate the second cover 61 and the secondary battery 1 .

A through hole 64a is provided in the second cover 61, a through hole 64b is provided in the second insulating member 63, the through hole 64a corresponds to the through hole 64b, and the pole column 52 defines the through hole 64a and the through hole 64b. It passes through and is connected to the secondary battery 1 .

The first housing 50 may be directly engaged with the second housing 60 to connect the first housing 50 and the second housing 60 . It can be understood that the form of connection between the first housing 50 and the second housing 60 is not limited to these.

In this embodiment, the first insulating member 53 and the second insulating member 63 are insulating gaskets. The first housing 50 is the positive housing and the second housing 60 is the negative housing. It can be appreciated that in other embodiments, the first insulating member 53 and the second insulating member 63 can be replaced with other structures having equivalent functions or actions. The polarities of the first housing 50 and the second housing 60 can be exchanged.

In one embodiment, the first housing 50 and the second housing 60 are manufactured from at least one or more of materials including, but not limited to, aluminum plastic film, polyethylene, polypropylene, polyethylene terephthalate. It may be a housing that is

In other embodiments, the first housing 50 and the second housing 60 comprise at least phenolic resins, polyurethane resins, epoxy resins, unsaturated polyester resins, furan resins, organosilicon resins, or allyl resins. The housing may be made of at least one or more of the following materials.

In other embodiments, the first housing 50 and the second housing 60 include, but are not limited to, at least steel materials, aluminum alloy materials, magnesium alloy materials, copper alloy materials, nickel alloy materials, titanium alloy materials. It may be a housing made of at least one or more of the following materials:

In different usage scenes, the first housing 50 and the second housing 60 can be made of different materials according to actual needs. For example, if high strength of the entire case 62 is required, the first housing 50 and the second housing 60 can be manufactured from steel material. Both the first housing 50 and the second housing 60 can include conductive materials to achieve electrical continuity when the battery module 100 is connected to an external structure. Furthermore, the first cover 51 and the lower part of the case 62 are made of a conductive material.

In this embodiment, the secondary battery 1 may be directly connected to the first housing 50 and the second housing 60 via the exposed first metal layer 13 and second metal layer 23, Thereby, it is not necessary to connect to the secondary battery 1 via another structure within the limited space of the first housing 50 and the second housing 60 . The space utilization rate of the battery module 100 is improved, so that a secondary battery 1 with a larger volume can be accommodated, and the energy density of the secondary battery 1 is improved.

44 and 45, in one embodiment, the battery module 100 further includes a connection member 70, the connection member 70 is provided between the secondary battery 1 and the first housing 50, or Alternatively, it is provided between the secondary battery 1 and the second housing 60 to connect the secondary battery 1 and the first housing 50 or the second housing 60 .

46 and 47 , in one embodiment, the battery module 100 may include two connecting members 70 , the two connecting members 70 connecting to a first connecting member 71 and a second connecting member 72 . split. A first connection member 71 connects the secondary battery 1 and the first housing 50 , and a second connection member 72 connects the secondary battery 1 and the second housing 60 .

The first connecting member 71 and the second connecting member 72 are metal clips. Using a metal clip to connect the first housing 50 and the second housing 60 can improve the use reliability of the battery core, and when the exposed metal layer is directly connected to the case 62, It is possible to avoid situations such as poor adhesion and bad deformation of the secondary battery 1 .

It can be appreciated that in other embodiments, the first connecting member 71 and the second connecting member 72 can be replaced with other structures having equivalent functions or actions.

48 and 49, in one embodiment, the secondary battery 1 is provided with a conductive plate 30, and the secondary battery 1 is connected to the first housing 50 or the second housing 60 via the conductive plate 30. Connected. Furthermore, when the secondary battery 1 is provided with the first conductive plate 31 and the second conductive plate 32 , the secondary battery 1 moves through the first conductive plate 31 and the second conductive plate 32 to the first housing. 50 and second housing 60 .

However, in order not to overcomplicate the drawings, the numbers may be omitted for some configurations or parts in this application. For example, the first electrode sheet 10, the first conductive layer 11, the first edge 111, the second edge 114, the first side edge 115, the first bend 12, the first edge 121, the first 1 boundary M, first material layer 14, first layer 16, second electrode sheet 20, second conductive layer 21, third edge 211, fourth edge 214, second side edge 215, the second bend 22, the second edge 221, the second boundary N, and the second material layer 24, etc., are omitted from the reference numerals in some of the figures.

In another embodiment, the secondary battery 1 may be combined with the connecting member 70 and the conductive plate 30 through the exposed metal layer and connected to the first housing 50 and the second housing 60. can be understood.

Second Embodiment Referring to FIGS. 50, 51 and 52, in the second embodiment, the secondary battery 1 and the battery module 100 are substantially the same as those in the first embodiment, with the following differences. That's right. The unfolded first electrode sheet 10 is provided along the third direction X, and when viewed from the first direction Z, the plurality of first conductive layers 11 along the third direction X The distance over which it extends is the same and the distance over which it extends along the second direction Y gradually decreases. an unfolded second electrode sheet 20 is provided along the second direction Y, the plurality of second conductive layers 21 extend the same distance along the third direction X; The distance extending along the second direction Y gradually decreases.

Third Embodiment Referring to FIGS. 53, 54 and 55, in the third embodiment, the secondary battery 1 and the battery module 100 are substantially the same as those in the second embodiment, with the following differences. That's right. The unfolded first electrode sheet 10 is provided in the second direction Y, and the plurality of first conductive layers 11 extends along the third direction X when viewed from the first direction Z. The distance extending along the second direction Y is the same and the distance extending along the second direction Y decreases gradually. The unfolded second electrode sheet 20 is provided along the third direction X, and when viewed from the first direction Z, the plurality of second conductive layers 21 along the third direction X The distance over which it extends is the same and the distance over which it extends along the second direction Y gradually decreases.

Fourth Embodiment Referring to FIGS. 56, 57 and 58, in the fourth embodiment, the secondary battery 1 and the battery module 100 are substantially the same as those in the first embodiment, with the following differences. That's right. An unfolded first electrode sheet 10 is provided along the third direction X, and the plurality of first conductive layers 11 extend along the third direction X gradually decreasing distance. , the distance extending along the second direction Y gradually decreases. An unfolded second electrode sheet 20 is provided along the second direction Y, the plurality of second conductive layers 21 extends along the third direction X for a reduced distance, The distance extending along the direction Y of 2 is reduced.

Fifth Embodiment Referring to FIG. 59 , the present application further provides an electronic device 200 , the electronic device 200 includes a main body 80 and a battery module 100 provided in the main body 80 for powering the main body 80 . Prepare. Since the battery module 100 is the battery module 100 in any of the above embodiments, it has all the beneficial effects of the battery module 100 . We will not discuss this in detail here.

The electronic device 200 may be a Bluetooth® earphone, a Bluetooth® speaker box, a smart phone, a smart wearable device, or the like.

Therefore, in the embodiment of the present application, a secondary battery 1 and a battery module 100 are provided, and by alternately stacking the first electrode sheets 10 and the second electrode sheets 20 along different directions, The space of the general case 62 encased in the battery 1 can accommodate more first electrode sheets 10 and second electrode sheets 20 if the case 62 has special size needs. so that the secondary battery 1 has high energy.

In addition, those skilled in the art will appreciate that the above embodiments are only for the purpose of describing the present application and not for the purpose of limiting the present application. Any suitable modifications and variations made to the examples are within the scope disclosed herein.

1 secondary battery 10 first electrode sheet 11 first conductive layer 111 first edge 112 first region 113, 116 second region 114 second edge 115, 115' first side edge H ₁ first distance O ₁ first point O ₂ second point H ₂ second distance
I ₁ Third point
I ₂ fourth point K ₁ distance between first edge and second conductive layer K ₂ distance between second edge and second conductive layer L ₁ first spacing distance L ₂ second spacing distance 12 first bend 121, 121a first edge M first boundary 13 first metal layer 131 first surface 132 second surface A first region 14 first material Layer 15 First end 16 First layer 17 First exposed portion 27 Second exposed portion 18 First opening 28 Second opening 20 Second electrode sheet 21 Second conductive layer 211 Third third edge 212 third region portion 213, 216 fourth region portion 214 fourth edge 215, 215' second side edge H ₃ third distance O ₃ fifth point O ₄ sixth point H ₄ fourth distance
I ₃ seventh distance
I4 the eighth distance K3 the distance between the _third edge and the first conductive layer K4 the distance in front of the _fourth edge and the first conductive layer 22 the second bend 221, 221a edge of 2 N second boundary 23 second metal layer 231 third surface 232 fourth surface B second region 24 second material layer 25 second edge D ₁ , D ₂ , D ₃ , _D4 , _D5 , _D6 projected length 30 conductive plate 31 first conductive plate 32 second conductive plate 40 separator 100 battery module 50 first housing 51 first cover 52 pole column 53 first insulating member 60 second housing 61 second cover 62 case 63 second insulating member 54a, 64a, 64b through hole 70 connecting member 71 first connecting member 72 second connecting member Z first direction Y second direction X third direction 200 electronic device 80 main body

Claims (37)

a first electrode sheet;
A secondary battery comprising a second electrode sheet,
The first electrode sheet includes a plurality of first conductive layers and first bent portions, and two adjacent first conductive layers are connected via the first bent portions. ,
The second electrode sheet includes a plurality of second conductive layers and second bent portions, and two adjacent second conductive layers are connected via the second bent portions. ,
A plurality of the first conductive layers and a plurality of the second conductive layers are alternately laminated,
When viewed along a first direction of the surface perpendicular to the first conductive layer, the first bend extends along a second direction perpendicular to the first direction. including a first edge, wherein the second bend includes a second edge extending along a third direction perpendicular to the first direction;
The secondary battery, wherein the second direction is different from the third direction. The first electrode sheet includes a first metal layer and a first material layer, the first metal layer includes a first surface and a second surface, the first material layer includes provided on the first surface and the second surface, wherein the first conductive layer and the first bending portion are formed by bending the first metal layer;
The second electrode sheet includes a second metal layer and a second material layer, the second metal layer includes a third surface and a fourth surface, the second material layer includes 3. A semiconductor device according to claim 1, wherein said second conductive layer and said second bending portion are formed by bending said second metal layer provided on said third surface and said fourth surface. 2. The secondary battery according to 1. The first electroded sheet includes a first end and the first surface has a first region extending from the first end where the first metal layer is exposed. 3. The secondary battery of claim 2, comprising: The second electroded sheet includes a second end located away from the first end of the second electroded sheet, and the third surface extends from the second end. 4. The secondary battery of claim 3, comprising a residing second region, said second region exposing said third surface. 5. The secondary battery of claim 4, wherein the first surface is exposed from the first bent portion. 6. The secondary battery as claimed in claim 5, wherein the first bent portion is provided with a first layer containing an insulating material at a position where the first surface is exposed. 5. The secondary battery of claim 4, wherein the third surface is exposed from the second bent portion. The first direction is the thickness direction of the first material layer and the second material layer, and the first material layer has a thickness at the first surface at the second surface. 3. The secondary battery of claim 2, wherein the thickness of the second material layer at the third surface is different from the thickness at the fourth surface. 2. The secondary battery according to claim 1, wherein a conductive plate is provided on said first electrode sheet or said second electrode sheet. A first conductive plate is provided on the first electrode sheet, a second conductive plate is provided on the second electrode sheet, and when observed along the first direction, the first conductive plate and 2. The secondary battery according to claim 1, wherein the range of the angle .theta. with respect to said second conductive plate is 0.degree. The first electrode sheet is provided with a first opening, the first conductive plate is positioned in the first opening, the second electrode sheet is provided with a second opening, and the second electrode sheet is provided with a first opening. 11. The secondary battery of claim 10, wherein a conductive plate is located in said second opening. The first conductive layer includes a first edge and a first area portion, and along the third direction, the projected length of the first area portion is the projected length of the first edge. The secondary battery according to claim 1, wherein the secondary battery is longer than the length. The first conductive layer further includes a second region portion, and the projected length of the second region portion is equal to the projected length of the first region portion along the third direction. 13. The secondary battery of claim 12, wherein the projected length of the edge is between 1. 13. The method of claim 12, wherein along the first direction there is a distance in the first bend that is greater than the distance between two adjacent first edges. secondary battery. The first conductive layer further includes a second edge opposite the first edge and along the second direction between the first edge and the second conductive layer. is different from the distance between the second edge and the second conductive layer. A distance between a first edge proximate the _first edge and the second conductive layer is K1, and a second edge proximate the second edge and the second conductive layer. 16. _{The secondary} battery of claim 15, wherein the distance between the layers is K2, and the _sum of K1 and K2 is 3mm or less. 13. The secondary battery of claim 12, wherein some of the first edges are separated from each other when viewed along the first direction. The first conductive layer further includes a first side edge, both ends of the first side edge are connected to the first edge and the second edge, respectively, along the first direction. 16. The secondary battery of claim 15, wherein some of the first side edges are separated from each other when viewed from above. 2. The secondary battery of claim 1, wherein some of the first bends are separated from each other along the first direction. The second conductive layer includes a third edge and a third area, and along the second direction, the projected length of the third area is the projected length of the third edge. The secondary battery according to claim 1, wherein the secondary battery is longer than the length. The second conductive layer further includes a fourth region portion, and the projected length of the fourth region portion is equal to the projected length of the third region portion along the second direction. 21. The secondary battery of claim 20, wherein the projected length of the edge is between 3. Both ends of the second bend are connected to adjacent third edges of the second conductive layer, and along the first direction, the second bend has two adjacent 21. The secondary battery of claim 20, wherein there is a distance that is greater than the distance between the third edges that overlap. The second conductive layer further includes a fourth edge opposite the third edge and along the third direction between the third edge and the first conductive layer. is different from the distance between the fourth edge and the first conductive layer. A distance between a second edge proximate the _third edge and the first conductive layer is K3, and a second edge proximate the fourth edge and the first conductive layer. _24. The secondary battery of claim 23, wherein the distance between the layers is _{K4 ,} and the sum of K3 and K4 is 3mm or less. The secondary battery of claim 20, wherein some of the third edges are separated from each other along the first direction. The second conductive layer further includes a second side edge, both ends of the second side edge are connected to the third edge and the fourth edge, respectively, along the first direction. 24. The secondary battery of claim 23, wherein some of the second side edges are separated from each other when viewed from above. 2. The secondary battery according to claim 1, wherein a part of said second bent portion overlaps along said first direction. Further comprising a separator provided between the first electrode sheet and the second electrode sheet and configured to separate the first electrode sheet and the second electrode sheet. The secondary battery according to claim 1. 29. The secondary battery of claim 28, wherein the separator comprises at least one of polyethylene or polypropylene. The plurality of first conductive layers have the same distance along the third direction and gradually decrease the distance along the second direction, and the plurality of first conductive layers 2. The two conductive layers extend the same distance along the third direction and gradually decrease in distance along the second direction. Secondary battery described in . The plurality of first conductive layers has a gradually decreasing distance along the third direction, a gradually decreasing distance along the second direction, and a plurality of the first conductive layers. The second conductive layer has a gradually decreasing distance along the third direction and a gradually decreasing distance along the second direction. Item 1. The secondary battery according to item 1. A battery module comprising a first housing and a second housing fitted to the first housing,
Further comprising the secondary battery according to any one of claims 1 to 31, wherein the secondary battery is accommodated in the first housing and the second housing, and the first housing and the A battery module electrically connected to a second housing. 32. Further comprising a connection member provided between the secondary battery and the first housing or provided between the secondary battery and the second housing. The battery module described in . Further comprising a first connection member and a second connection member, the first connection member connecting the secondary battery and the first housing, the second connection member connecting the secondary battery and the 33. The battery module of claim 32, connecting a second housing. 33. The battery module of claim 32, wherein said first housing and said second housing are at least one of aluminum plastic film, polyethylene, polypropylene, polyethylene terephthalate. The first housing and the second housing comprise at least one of phenolic resin, polyurethane resin, epoxy resin, unsaturated polyester resin, furan resin, organosilicon resin, or allyl resin. 33. The battery module of claim 32. The first housing and the second housing are characterized by comprising at least one of steel material, aluminum alloy material, magnesium alloy material, copper alloy material, nickel alloy material, or titanium alloy material. 33. The battery module of claim 32.

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